/includes/db/mssql.php
PHP | 433 lines | 290 code | 62 blank | 81 comment | 48 complexity | b28cbc5d262936788f91b7dd9d905aa3 MD5 | raw file
Possible License(s): AGPL-1.0
- <?php
- /**
- *
- * @package dbal
- * @version $Id: mssql.php 8479 2008-03-29 00:22:48Z naderman $
- * @copyright (c) 2005 phpBB Group
- * @license http://opensource.org/licenses/gpl-license.php GNU Public License
- *
- */
- /**
- * @ignore
- */
- if (!defined('IN_PHPBB'))
- {
- exit;
- }
- include_once($phpbb_root_path . 'includes/db/dbal.' . $phpEx);
- /**
- * MSSQL Database Abstraction Layer
- * Minimum Requirement is MSSQL 2000+
- * @package dbal
- */
- class dbal_mssql extends dbal
- {
- /**
- * Connect to server
- */
- function sql_connect($sqlserver, $sqluser, $sqlpassword, $database, $port = false, $persistency = false, $new_link = false)
- {
- $this->persistency = $persistency;
- $this->user = $sqluser;
- $this->server = $sqlserver . (($port) ? ':' . $port : '');
- $this->dbname = $database;
- @ini_set('mssql.charset', 'UTF-8');
- @ini_set('mssql.textlimit', 2147483647);
- @ini_set('mssql.textsize', 2147483647);
- if (version_compare(PHP_VERSION, '5.1.0', '>=') || (version_compare(PHP_VERSION, '5.0.0-dev', '<=') && version_compare(PHP_VERSION, '4.4.1', '>=')))
- {
- $this->db_connect_id = ($this->persistency) ? @mssql_pconnect($this->server, $this->user, $sqlpassword, $new_link) : @mssql_connect($this->server, $this->user, $sqlpassword, $new_link);
- }
- else
- {
- $this->db_connect_id = ($this->persistency) ? @mssql_pconnect($this->server, $this->user, $sqlpassword) : @mssql_connect($this->server, $this->user, $sqlpassword);
- }
- if ($this->db_connect_id && $this->dbname != '')
- {
- if (!@mssql_select_db($this->dbname, $this->db_connect_id))
- {
- @mssql_close($this->db_connect_id);
- return false;
- }
- }
- return ($this->db_connect_id) ? $this->db_connect_id : $this->sql_error('');
- }
- /**
- * Version information about used database
- */
- function sql_server_info()
- {
- $result_id = @mssql_query("SELECT SERVERPROPERTY('productversion'), SERVERPROPERTY('productlevel'), SERVERPROPERTY('edition')", $this->db_connect_id);
- $row = false;
- if ($result_id)
- {
- $row = @mssql_fetch_assoc($result_id);
- @mssql_free_result($result_id);
- }
- if ($row)
- {
- return 'MSSQL<br />' . implode(' ', $row);
- }
- return 'MSSQL';
- }
- /**
- * SQL Transaction
- * @access private
- */
- function _sql_transaction($status = 'begin')
- {
- switch ($status)
- {
- case 'begin':
- return @mssql_query('BEGIN TRANSACTION', $this->db_connect_id);
- break;
- case 'commit':
- return @mssql_query('COMMIT TRANSACTION', $this->db_connect_id);
- break;
- case 'rollback':
- return @mssql_query('ROLLBACK TRANSACTION', $this->db_connect_id);
- break;
- }
- return true;
- }
- /**
- * Base query method
- *
- * @param string $query Contains the SQL query which shall be executed
- * @param int $cache_ttl Either 0 to avoid caching or the time in seconds which the result shall be kept in cache
- * @return mixed When casted to bool the returned value returns true on success and false on failure
- *
- * @access public
- */
- function sql_query($query = '', $cache_ttl = 0)
- {
- if ($query != '')
- {
- global $cache;
- // EXPLAIN only in extra debug mode
- if (defined('DEBUG_EXTRA'))
- {
- $this->sql_report('start', $query);
- }
- $this->query_result = ($cache_ttl && method_exists($cache, 'sql_load')) ? $cache->sql_load($query) : false;
- $this->sql_add_num_queries($this->query_result);
- if ($this->query_result === false)
- {
- if (($this->query_result = @mssql_query($query, $this->db_connect_id)) === false)
- {
- $this->sql_error($query);
- }
- if (defined('DEBUG_EXTRA'))
- {
- $this->sql_report('stop', $query);
- }
- if ($cache_ttl && method_exists($cache, 'sql_save'))
- {
- $this->open_queries[(int) $this->query_result] = $this->query_result;
- $cache->sql_save($query, $this->query_result, $cache_ttl);
- }
- else if (strpos($query, 'SELECT') === 0 && $this->query_result)
- {
- $this->open_queries[(int) $this->query_result] = $this->query_result;
- }
- }
- else if (defined('DEBUG_EXTRA'))
- {
- $this->sql_report('fromcache', $query);
- }
- }
- else
- {
- return false;
- }
- return ($this->query_result) ? $this->query_result : false;
- }
- /**
- * Build LIMIT query
- */
- function _sql_query_limit($query, $total, $offset = 0, $cache_ttl = 0)
- {
- $this->query_result = false;
- // Since TOP is only returning a set number of rows we won't need it if total is set to 0 (return all rows)
- if ($total)
- {
- // We need to grab the total number of rows + the offset number of rows to get the correct result
- if (strpos($query, 'SELECT DISTINCT') === 0)
- {
- $query = 'SELECT DISTINCT TOP ' . ($total + $offset) . ' ' . substr($query, 15);
- }
- else
- {
- $query = 'SELECT TOP ' . ($total + $offset) . ' ' . substr($query, 6);
- }
- }
- $result = $this->sql_query($query, $cache_ttl);
- // Seek by $offset rows
- if ($offset)
- {
- $this->sql_rowseek($offset, $result);
- }
- return $result;
- }
- /**
- * Return number of affected rows
- */
- function sql_affectedrows()
- {
- return ($this->db_connect_id) ? @mssql_rows_affected($this->db_connect_id) : false;
- }
- /**
- * Fetch current row
- */
- function sql_fetchrow($query_id = false)
- {
- global $cache;
- if ($query_id === false)
- {
- $query_id = $this->query_result;
- }
- if (isset($cache->sql_rowset[$query_id]))
- {
- return $cache->sql_fetchrow($query_id);
- }
- if ($query_id === false)
- {
- return false;
- }
- $row = @mssql_fetch_assoc($query_id);
- // I hope i am able to remove this later... hopefully only a PHP or MSSQL bug
- if ($row)
- {
- foreach ($row as $key => $value)
- {
- $row[$key] = ($value === ' ' || $value === NULL) ? '' : $value;
- }
- }
- return $row;
- }
- /**
- * Seek to given row number
- * rownum is zero-based
- */
- function sql_rowseek($rownum, &$query_id)
- {
- global $cache;
- if ($query_id === false)
- {
- $query_id = $this->query_result;
- }
- if (isset($cache->sql_rowset[$query_id]))
- {
- return $cache->sql_rowseek($rownum, $query_id);
- }
- return ($query_id !== false) ? @mssql_data_seek($query_id, $rownum) : false;
- }
- /**
- * Get last inserted id after insert statement
- */
- function sql_nextid()
- {
- $result_id = @mssql_query('SELECT SCOPE_IDENTITY()', $this->db_connect_id);
- if ($result_id)
- {
- if ($row = @mssql_fetch_assoc($result_id))
- {
- @mssql_free_result($result_id);
- return $row['computed'];
- }
- @mssql_free_result($result_id);
- }
- return false;
- }
- /**
- * Free sql result
- */
- function sql_freeresult($query_id = false)
- {
- global $cache;
- if ($query_id === false)
- {
- $query_id = $this->query_result;
- }
- if (isset($cache->sql_rowset[$query_id]))
- {
- return $cache->sql_freeresult($query_id);
- }
- if (isset($this->open_queries[$query_id]))
- {
- unset($this->open_queries[$query_id]);
- return @mssql_free_result($query_id);
- }
- return false;
- }
- /**
- * Escape string used in sql query
- */
- function sql_escape($msg)
- {
- return str_replace("'", "''", $msg);
- }
- /**
- * Build LIKE expression
- * @access private
- */
- function _sql_like_expression($expression)
- {
- return $expression . " ESCAPE '\\'";
- }
- /**
- * return sql error array
- * @access private
- */
- function _sql_error()
- {
- $error = array(
- 'message' => @mssql_get_last_message(),
- 'code' => ''
- );
- // Get error code number
- $result_id = @mssql_query('SELECT @@ERROR as code', $this->db_connect_id);
- if ($result_id)
- {
- $row = @mssql_fetch_assoc($result_id);
- $error['code'] = $row['code'];
- @mssql_free_result($result_id);
- }
- // Get full error message if possible
- $sql = 'SELECT CAST(description as varchar(255)) as message
- FROM master.dbo.sysmessages
- WHERE error = ' . $error['code'];
- $result_id = @mssql_query($sql);
-
- if ($result_id)
- {
- $row = @mssql_fetch_assoc($result_id);
- if (!empty($row['message']))
- {
- $error['message'] .= '<br />' . $row['message'];
- }
- @mssql_free_result($result_id);
- }
- return $error;
- }
- /**
- * Build db-specific query data
- * @access private
- */
- function _sql_custom_build($stage, $data)
- {
- return $data;
- }
- /**
- * Close sql connection
- * @access private
- */
- function _sql_close()
- {
- return @mssql_close($this->db_connect_id);
- }
- /**
- * Build db-specific report
- * @access private
- */
- function _sql_report($mode, $query = '')
- {
- switch ($mode)
- {
- case 'start':
- $html_table = false;
- @mssql_query('SET SHOWPLAN_TEXT ON;', $this->db_connect_id);
- if ($result = @mssql_query($query, $this->db_connect_id))
- {
- @mssql_next_result($result);
- while ($row = @mssql_fetch_row($result))
- {
- $html_table = $this->sql_report('add_select_row', $query, $html_table, $row);
- }
- }
- @mssql_query('SET SHOWPLAN_TEXT OFF;', $this->db_connect_id);
- @mssql_free_result($result);
- if ($html_table)
- {
- $this->html_hold .= '</table>';
- }
- break;
- case 'fromcache':
- $endtime = explode(' ', microtime());
- $endtime = $endtime[0] + $endtime[1];
- $result = @mssql_query($query, $this->db_connect_id);
- while ($void = @mssql_fetch_assoc($result))
- {
- // Take the time spent on parsing rows into account
- }
- @mssql_free_result($result);
- $splittime = explode(' ', microtime());
- $splittime = $splittime[0] + $splittime[1];
- $this->sql_report('record_fromcache', $query, $endtime, $splittime);
- break;
- }
- }
- }
- ?>